Final answer:
Sucrose is an example of a non-reducing sugar, and it can be broken down into its monomers glucose and fructose through enzymatic hydrolysis by the enzyme sucrase, which adds water to cleave the glycosidic bond.
Step-by-step explanation:
An example of a non-reducing sugar is sucrose, which does not have a free aldehydic or ketonic group and therefore cannot perform as a reducing sugar. A method to break down sucrose into its constituent monomers, glucose, and fructose, without heating with HCl is through enzymatic hydrolysis. The enzyme sucrase (also known as invertase) catalyzes this reaction, where a water molecule is used to split the sucrose molecule.
During the hydrolysis reaction, each monomer gains parts of the water molecule, one gaining a hydrogen atom (H+) and the other an hydroxyl group (OH-). This breakdown does not involve oxidation or reduction but rather the enzymatic cleavage of the glycosidic bond between the two monomers.